Page generated: 10 Nov 2026, 18:00 UTC
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CVE-2020-1464

A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intende…

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A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and load improperly signed files. In an attack scenario, an attacker could bypass security features intended to prevent improperly signed files from being loaded. The update addresses the vulnerability by correcting how Windows validates file signatures.
CVSS 7.8 (HIGH) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE
0.0/10
REALITY · THREAT PRIORITY
8.4/10
General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?
  • Recorded exploitation baseline: +7.00
  • Technical severity: CVSS 7.8: +1.17
  • Fresh EPSS: 38.95%: +0.19

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 10 documents and public datasets.

Hype components

Headline sample (25%)
0/100
Press, 30 days (60%)
0/100
Grounded branding (15%)
0/100
HYPE TOTAL0/100

Sources and documents

Qualys
Press · 22 Feb 2022, 08:00 · Managing CISA Known Exploited Vulnerabilities with Qualys VMDR - Qualys
BleepingComputer
Press · 14 Oct 2020, 07:00 · Microsoft fixes Windows certificate spoofing bug abusing CAT files - BleepingComputer
Krebs on Security
Press · 17 Aug 2020, 07:00 · Microsoft Put Off Fixing Zero Day for 2 Years - Krebs on Security
BleepingComputer
Press · 17 Aug 2020, 07:00 · Microsoft fixes actively exploited Windows bug reported 2 years ago - BleepingComputer
Israel Defense
Press · 17 Aug 2020, 07:00 · Researcher shows exploitation of vulnerability in Windows system - Israel Defense
See all 10 source documents
ET Telecom
Press · 13 Aug 2020, 07:00 · Microsoft fixes 120 vulnerabilities, including 2 zero-day bugs - ET Telecom
BankInfoSecurity
Press · 12 Aug 2020, 07:00 · More Microsoft Zero-Day Flaws Being Exploited - BankInfoSecurity
The Hacker News
Press · 12 Aug 2020, 07:00 · Microsoft Reveals New Innocent Ways Windows Users Can Get Hacked - The Hacker News
TechTarget
Press · 12 Aug 2020, 07:00 · Microsoft plugs 2 zero-days on August Patch Tuesday - TechTarget
BleepingComputer
Press · 11 Aug 2020, 07:00 · Microsoft August 2020 Patch Tuesday fixes 2 zero-days, 120 flaws - BleepingComputer

Score evolution

● Hype   ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.4 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

0

Public exploit entries / repo candidates

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence
Exploitation recorded
Priority basis
Recorded exploitation; CVSS 7.8; EPSS 38.9%
Attention, last 30 days
0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential
local access, low privileges, no user interaction.
Observed activity
Exploitation recorded in CISA KEV.
Known scale
Not quantified.
Evidence confidence basis
Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:14.320098+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline
First press mention
11 Aug 2020, 07:00
Published
17 Aug 2020, 19:13
Added to the CISA KEV catalog
03 Nov 2021, 00:00
Latest press mention
22 Feb 2022, 08:00
Score calculated
05 Nov 2026, 13:58